I found that a mechanic that used non Volvo Transmission Fluid caused this problem in my 2002. Once it was replaced with genuine Volvo transmission fluid it stopped surging.
The 2002 Volvo S80 has 24 valves.
The 2002 Volvo C70 has 20 valves.
The 2002 Volvo S60 has 20 valves.
The 2002 Volvo C70 is a gas-powered vehicle.
The 2002 Volvo S60 is a gas-powered vehicle.
The 2002 Volvo S80 is a gas-powered vehicle.
The 2002 Volvo C70 has a 5-speed manual.
The 2002 Volvo S80 has an inline 6 engine.
The 2002 Volvo S60 has an inline 5 engine.
The 2002 Volvo S80 has a 4-speed automatic.
The 2002 Volvo C70 has an inline 5 engine.
The 2002 Volvo S60 has a 5-speed manual.